When I go to the boot menu on my computer and select USB stick, the screen goes black and there comes a flickering underline. Like I could write something. But I can't. Whatever I push, nothing happens. Except the PrintScrn/SysRq button. When I push it, mu computer beeps. I get no choose menu. Nothing.

I found out the usb stick is in msdos format. So what format should I use and how can I format it? I am not a computer geek who knows everything. I'm just a beginner. And only 16 years old.

I've got a new problem. The screen isn't black anymore. Now there comes an error message:

SYSLINUX 4.04 CHS 20110518 Copyright (C) 1994-2011 H.Peter Anvin et al
ERROR:No configurationfile found
No DEFAULT or UI configuration directive found!
boot:

And when I write something:

boot:example
Could not find kernel image:example
boot:

Why does this fail all the time? ps. I'm using Ubuntu Oneiric 11.10.